The FIA reportedly recorded high vertical oscillating data in Lewis Hamilton’s and Charles Leclerc's car which prompted their investigation.
Data measured during the race reportedly prompted the FIA into action.
Martin Brundle on the United States GP: Lewis Hamilton disqualification shows need to tweak Sprint format, F1 News
Hamilton and Leclerc disqualified from F1 US GP for car plank rules breach
Ferrari make 'sensational' move for Lewis Hamilton with stunning F1 2025 plan : PlanetF1, hamilton f1
Ferrari make 'sensational' move for Lewis Hamilton with stunning F1 2025 plan : PlanetF1, hamilton f1
Lewis Hamilton suspects more than '50 per cent' of F1 cars would have breached plank rules at US GP if whole grid were checked, F1 News
Charles Leclerc adamant plank 'gave no performance' after disqualification : PlanetF1
Ferrari make 'sensational' move for Lewis Hamilton with stunning F1 2025 plan : PlanetF1, hamilton f1
Explained: Post Race Plank Checks; reason why Lewis Hamilton & Charles Leclerc were disqualified from USGP
Lewis Hamilton suspects more than '50 per cent' of F1 cars would have breached plank rules at US GP if whole grid were checked, F1 News
EXPLAINED! Why Lewis Hamilton and Charles Leclerc were disqualified in Austin 🔍